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United States Patent | 5,124,534 |
Williams ,   et al. | June 23, 1992 |
The improved heating coil support and insulation mechanism of the present invention is intended for use in regard to electrical heating assemblies which include heating coils supported and electrically insulated by means of coil support insulators, and each of which includes an insulator body and coil engagement means attached to the insulator body for engaging the convolutions of the heating coil. In the improvement of the present invention support rods have a locking projection disposed from a longitudinal surface thereof. The insulator body has a pair of support rod apertures extending therethrough, which have a rod support locking projection accommodation slots therein for initially receiving passage therethrough of the locking projection of the support rod. The locking projection on the support rod, upon initial insertion, is matingly disposed with respect to the support rod locking projection accommodation slot for passage therethrough and thereafter is disposed at a radial angle rotationally therefrom to prevent relative longitudinal movement between the insulator body and the support rod.
Inventors: | Williams; Steven E. (Murfreesboro, TN); Leeman; Donald G. (Murfreesboro, TN) |
Assignee: | Lennox Industries Inc. (Murfreesboro, TN) |
Appl. No.: | 718955 |
Filed: | June 21, 1991 |
Current U.S. Class: | 219/532; 174/138J; 174/175; 219/536; 219/542; 338/304; 338/318 |
Intern'l Class: | H05B 003/06 |
Field of Search: | 219/532,536,542 174/138 J,175 411/349,549,553 292/59 403/348,349 338/304,318,317 |
4363959 | Dec., 1982 | Cottrell et al. | 219/532. |
4692599 | Sep., 1987 | Howard et al. | 219/532. |
Foreign Patent Documents | |||
1040289 | Sep., 1983 | SU | 219/532. |
292665 | Oct., 1927 | GB | 403/349. |